It looks like your container clip (cnt) is being created at
the same level each time (10) so each new instance will replace the
last one. This may not be THE problem but could be A problem
(correct me if im wrong please).
I would also recommend that you check out the MovieClipLoader
Class (version permitting) as it is much more stable and means you
don't have to write your own progress checkers etc.
Sorry I cant be more help. Good luck